Fast Wire Incorporated manufactures a scrambling device for cellular phones. The main component of the scrambling device is a very delicate partDTV-12. DTV-12 requires careful handlings during manufacturing. Once damaged, the part must be discarded. Only skilled laborers are hired to manufacture and install DTV-12. Damages still occur, however. The following are the operating data of Fast Wire Incorporated for 2021 and 2022 relative to the insertion of DTV-12.

	2021	2022
Number of phones manufactured	634,200	783,600
Units of DTV-12 used	961,800	1,075,500
Direct labor hours for DTV-12 insertion	2,100	2,930
Total cost of DTV-12 units	$ 1,445,250	$ 2,335,250
Direct labor wage rate per hour	$ 76.00	$ 94

The partial direct labor operational productivity ratio for 2021 is:

Multiple Choice

231 units per DLH.

138 units per DLH.

397 units per DLH.

269 units per DLH.

302 units per DLH.